<template>
	<view class="search-box" >
	  <!-- 使用 uni-ui 提供的搜索组件 -->
	  <uni-search-bar :show="show" :radius="100" :showSync="showSync" placeholder="自定义背景色" @input="input" bgColor="#EEEEEE"/>
	  <view class="sugg-list" v-if="searchResults.length !== 0">
	    <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
	      <view class="goods-name">{{item.goods_name}}</view>
	      <uni-icons type="arrowright" size="16"></uni-icons>
	    </view>
	  </view>
	  <view class="history-box" v-else>
	    <!-- 标题区域 -->
	    <view class="history-title">
	      <text>搜索历史</text>
	      <uni-icons @click="clearHistory()" type="trash" size="17"></uni-icons>
	    </view>
	    <!-- 列表区域 -->
	    <view class="history-list">
	      <uni-tag :circle="true" :text="item" v-for="(item, i) in histories" @click="gotoGoodsList(item)" :key="i"></uni-tag>
	    </view>
	  </view>
	  <!-- 搜索建议列表 -->
	</view>
	<!-- 搜索历史 -->	 
</template>
<script>
	export default {
		data() {
			return {
				show: true,
				showSync: true,
				searchVal: "",
				// 延时器的 timerId
				timer:null,
				kw:'',
				// 搜索结果列表
				searchResults: [],
				//搜索关键词的历史记录
				historyList: []
			};
		},
		onLoad() {
			 this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			input(e) {
			    // e.value 是最新的搜索内容
			    clearTimeout(this.timer)
				this.timer = setTimeout(() => {
				    // 如果 500 毫秒内，没有触发新的输入事件，则为搜索关键词赋值
				    this.kw = e
					 this.getSearchList()
				    console.log(this.kw)
				  }, 500)
			  },
			  async getSearchList() {
			    // 判断关键词是否为空
			    if (this.kw === '') {
			      this.searchResults = []
			      return
			    }
			    // 发起请求，获取搜索建议列表
			    const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
			    if (res.meta.status !== 200) return uni.$showMsg()
			    this.searchResults = res.message
				this.saveSearchHistoryList()
			  },
			  gotoDetail(goods_id){
				  uni.navigateTo({
				      // 指定详情页面的 URL 地址，并传递 goods_id 参数
					  url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
				})
			},
			saveSearchHistoryList(){
				const set = new Set(this.historyList)
				set.add(this.kw)
				this.historyList=Array.from(set)
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clearHistory() {
			  // 清空 data 中保存的搜索历史
			  this.historyList = []
			  // 清空本地存储中记录的搜索历史
			  uni.setStorageSync('kw', '[]')
			},
			// 点击跳转到商品列表页面
			gotoGoodsList(kw) {
			  uni.navigateTo({
			    url: '/subpkg/goods_list/goods_list?query=' + kw
			  })
			}
		},
		 
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>
<style lang="scss">
.search-box{
	margin: 0;
	background-color:#87CEFA;
	position: sticky;
	top: 0;
	z-index: 999;
}
.sugg-list {
  padding: 0 5px;
   background-color:#ffffff;
  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 2px solid #ffeaf2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    .goods-name {
      // 文字不允许换行（单行文本）
     white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
background-color:#ffffff;
  padding: 0 5px;
  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
  }
  .history-list {
    display: flex;
    flex-wrap: wrap;
    uni-tag {
      margin-top: 5px;
	  margin-right:8px;
    }
  }
}
</style>
